Is it illegal to work in a hotel for seven days without being paid?

You can sue them:

1. First of all, you must prove the existence of a labor relationship between you and the amount of unpaid wages. The evidence includes: labor contract, wage payment certificate, etc.

2. If there is no labor contract signed, then the work permit, employer recruitment registration form filled out by the worker, attendance records, testimonies of other workers, recordings, etc. can be used as evidence.

3. For malicious wage arrears, in addition to full payment of wages to workers, an additional economic compensation equivalent to 25% of wages must be paid.

4. After you have enough evidence, you can first negotiate with the boss to resolve the matter. If the negotiation fails, you can report to the labor inspection brigade or apply for labor arbitration. If you are not satisfied with the arbitration result, you can file a lawsuit in court within 15 days after receiving the arbitration letter.